node.js中使用http-proxy-middleware请求转发给其它服务器

var express = require(‘express‘);
var proxy = require(‘http-proxy-middleware‘);

var app = express();

app.use(‘/api‘, proxy({target: ‘http://10.119.168.87:4000‘, changeOrigin: true}));
app.listen(3000);

说明：我们利用express在3000端口启动了一个小型的服务器，利用了app.use(‘/api‘, proxy({target: ‘http://10.119.168.87:4000/‘, changeOrigin: true}))这句话，使发到3000端口的/api请求转发到了4000端口。即请求http://localhost:3000/api相当于请求http://10.119.168.87:4000/api。

安装： npm install --save-dev http-proxy-middleware

1 var proxy = require(‘http-proxy-middleware‘);
2 
3 var apiProxy = proxy(‘/api‘, {target: ‘http://www.example.org‘});
4                      \____/   \_____________________________/
5                         |                    |
6                    需要转发的请求           目标服务器